/ Dictionary / Index M mechanical twin: Meaning and Definition of Find definitions for: mechan'ical twin' Pronunciation: [key] a crystalline twin formed by the strain set up by an applied force. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. mechanical suspension mechanician Related Content Daily Word Quiz: fresco Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language